碳点的光电催化特性  

The photoelectrocatalytic properties of carbon dots

作　　者：康振辉[1] KANG Zhen-hui(Soochow University,Institute of Functional Nano&Soft Materials(FUNSOM),Jiangsu Key Laboratory for Carbon-Based Functional Materials&Devices,Suzhou 215123,China)

机构地区：[1]苏州大学功能纳米与软物质研究院,江苏省碳基功能材料与器件重点实验室,江苏苏州215123

出　　处：《分子科学学报》2021年第6期483-500,共18页Journal of Molecular Science

基　　金：国家重点研发计划资助项目(2020YFA0406104);国家MCF能源研发计划资助项目(2018YFE0306105);国家自然科学基金创新群体项目(51821002);国家自然科学基金资助项目(51725204,21771132,51972216,52041202);江苏省特聘教授,江苏省自然科学基金资助项目(BK20190041);苏州纳米科技协同创新中心资助项目;苏州市功能纳米与软物质(材料)重点实验室资助项目;“111”计划资助项目。

摘　　要：近年来量子点研究领域不断拓展材料的范围与科学内涵.人们借用量子点的概念描述具有荧光特性的碳点.随着研究的深入,我们发现碳点不仅具有类似量子点的强发光特性,还表现出传统量子点无法比拟的水相分散性和生物相容性.碳点兼具有机分子材料和零维小尺寸碳材料的性质.十多年来,碳点在电子学、光学、光电化学、催化化学、生命科学以及能源环境等领域受到极大关注.碳点的小尺寸效应和表面活性赋予了它丰富的光电化学性质,为发展高效的碳基光电催化剂带来了新的机遇.目前,已有综述总结了碳点的合成、光学性质、催化和生物活性以及光电器件应用.本文主要针对晶态碳点的合成、结构特征、光电化学性质进行介绍,进一步开展基于碳点的高效光电催化体系的讨论.此外,本文还将以碳点光电催化体系为例,介绍光电催化过程的瞬态表征新方法.最后,我们讨论了面向光电催化应用碳点研究存在的挑战和机遇.Carbon-based nanostructures have received much attention due to their unique physicochemical properties and diverse applications.Compared to other carbon nanostructures,carbon dots exhibit abundant photoluminescence(PL)and photoelectrochemical properties.Recently,the scope of quantum dots in material and scientific connotation has continuously expanded,and the concept of quantum dot was used to describe carbon dot with strong fluorescence.Carbon dots can be defined as spherical-like carbon particles(graphitic fragments)with sizes less than 10 nm.Carbon dots not only possess the characteristics of strong luminescence and small size similar to traditional quantum dots,but also show the advantages of good water dispersibility and biocompatibility beyond traditional quantum dots.Carbon dot is a quantum size material with the properties of both organic molecular and carbon material.Over the past decade,carbon dots have attracted great attention in the fields of electronics,optics,photoelectrochemistry,catalytic chemistry,life science,energy and environment.The small size effect and highly surface activity of carbon dots bring the rich photoelectrochemical properties as well as great opportunities for carbon based photoelectrocatalyts.In 2010,a facile electrochemical approach was developed for the large-scale fabrication of high-quality carbon dots with high purity,using graphite rods and pure water as the starting materials.The well crystalline carbon dots show size-dependent PL and rich photoelectrocatalytic properties.Carbon dots also have many unique properties,such as tunable PL,dispersibility,low toxicity,biocompatibility,bio-degradation,abundant raw materials and low cost.Those features thus bode well for the wide applications of carbon dots in bioimaging,optoelectronic devices,catalysis and functional materials.The relationships between the structure,surface composition and photoelectrochemical properties of carbon dots were also clarified.Especially,we have proposed a simple semi-empirical equation for determi

关 键 词：碳点 光电化学性质 光电催化 光电瞬态表征方法 复合光电催化体系 

分 类 号：O631[理学—高分子化学]